Hey, CC and UCC user for a long time here, I can personally assure you there's nothing to worry about between UCC and Character Creator ! In fact I had an issue recently making me think of a potential rigging issue with some of UCC's animation but that wasn't even the case ! Allow me to do a little bit of shameless advertisement by sharing my youtube channel if you want to see some combinations of UCC and Character Creator : https://www.youtube.com/@darkpioupiou/videos
Thank you both for the informational replies. I will take a look at your YouTube. I was particularly trying to match the rigging that the Atlas character had. Unfortunately, I am still a little new to CC4. I need to need to prototype quickly as possible.